Langley, J. A. Risk, uncertainty and the instability of incomes in agriculture / J. A. Langey. - Newton Abbot , 1966. - 27p. ; 23 cm. - Exeter. University. Dept. of Economics. Occasional paper ; no. 2 . Subjects--Topical Terms: Agriculture--Economic aspects Dewey Class. No.: P 338.13 L36